The present invention relates to a syringe and, particularly, to a device, with respect to an existing syringe that forms an injection passage including a syringe needle, which by sharing a portion of the injection passage with the exception of the syringe needle or by forming a suctioning passage completely separated from the injection passage, facilitates smoother suctioning of liquid medicine. With respect to a syringe including a syringe needle (10) and a cylinder (20) and forming an injection passage extending from the cylinder (20) to the syringe needle (10), the syringe is configured by comprising: opening/closing means (400) for selectively sealing the injection passage a through-hole that communicates the inside and outside of any one the syringe needle (10), a connector (500) for connecting the syringe needle (10) to the cylinder (20), and the cylinder (20) and a one-way valve means (300) for restricting the opening and closing of the through-hole, wherein the syringe further comprises a suctioning passage extending from a hollow cap (100) having a tip to the cylinder (20). By forming a separate suctioning passage that does not pass through a syringe needle on an existing syringe to facilitate smoother suctioning of liquid medicine, user convenience and product value can be maximized.La présente invention concerne une seringue et, en particulier, un dispositif qui, par rapport à une seringue existante qui forme un passage dinjection comprenant une aiguille pour seringue, facilite une aspiration plus régulière du médicament liquide en partageant une partie du passage dinjection à lexception de laiguille pour seringue ou en formant un passage daspiration complètement séparé du passage dinjection. Par rapport à une seringue comportant une aiguille pour seringue (10) et un cylindre (20) et qui forme un passage dinjection se prolongeant à partir du cylindre (20) et jusquà laiguille pour seringue (10), la présente seringue est conçue de façon à comporter : des m
